Video games are maturing. Where players once practiced delivering newspapers or dispatching demons, they are now increasingly being asked to tackle real-world problems like climate change and war. Follow author Dylan Walsh as he surveys the scene and logs on to try to save the globe.

Sunrise on the coral reef at Shark Island lagoon, French Frigate Shoals. Shark Island is part of the Hawaiian Islands National Wildlife Refuge and the Papahanaumokuakea Marine National Monument. Image credit: Lindsey Kramer/ USFWS

President Obama has twice rejected construction of the Keystone XL pipeline, declaring it not in the national interest. If you're wondering from where he derives this authority, here's a hint: that's a trick question.

Documentary filmmaker Marshall Curry has said that he likes to "present people's best arguments and let those smack into each other." His third and most recent project does this exceedingly well – many good arguments, much tough smacking.